Johnson Controls YJHJXH024BARR-FX, Руководство по обслуживанию

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Function and Control
Domestic Air Conditioner
24
The temperature of the outdoor
air
˄
Ta
˅
Airflow speed
Ta 22 ̱ ć Low
19 Ta<22 ć̰ ć Keeping the speed
16 Ta<22
ć̰ ć
Medium
14 Ta<16 ć̰ ć Keeping the speed
Ta<14 ć High
5.2.3
˖
The control of the outdoor electronic expansion valve
When starting the compressor: the opening size of the valve must be guaranteed to have entered into
the standard opening size, and then the compressor can be started.
When refrigeration is in vain (the machine is shut down or is in the state of retrograde operation), the
opening size of the expansion valve of the indoor unit is 5 steps;
When heating is in vain, the opening size of the expansion valve of the indoor unit is 55 steps;
When the outdoor unit is shut down, the valve is opened completely for 2 minutes, and then begin
initialization.
The scope of refrigerationg valve 60-----480 steps
The scope of heating valve 90-----480 steps
The valves are adjusted according to the degree of superheat —SHa ˈ SHa. Ƹ
5.2.4
˖
Four way control
For the details of defrosting four-way valve control, see the defrosting process.
Four way working in other ways:
Under the mode of heating, open the four-way valve, when the compressor is not started or changed
to non-heating mode, make sure the compressor is stoped for 2 minutes, and then close the four-way
valve.
5.2.5
˖
The outdoor defrosting control
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When starting running heating, the compressor continuously runs for over 10 minutes, after running
for 45 minutes in all (defrosting is ended or when entering into refrigeration mode, clear the
compressor’s cumulative run time), through detecting the defrosting sensor TCS ˄ detect the defrosting
situation of the heat exchanger of the outdoor unit ˅ and the outdoor environment temperature sensor
TA, and meeting the following conditions continuously for 2 minutes, the machine enters into the
defrosting operation:
TCS≤C×TA ˉ α
α is determined as the following according to the data of EEPROM:
C selcet ˖ if Tao ˘ 0 ć ˈ C=0.8;if Tao≥0 ć ˈ C=0.6 ˈ αis read from EEPROM ˈ Normal State: α=6
The temperature limitation for entering into defrosting mode -15 ≤C×TA ć ˉ α≤-5 ć
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When the result of C×TA ˉ α is in the scope of -15 ≤C×TA ć ˉ α, the interval between two
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